Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
  • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
  • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
  • B65H29/041—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands and introducing into a pile
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
  • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
  • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
  • B65H29/042—Intermediate conveyors, e.g. transferring devices
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/40—Type of handling process
  • B65H2301/44—Moving, forwarding, guiding material
  • B65H2301/446—Assisting moving, forwarding or guiding of material
  • B65H2301/4461—Assisting moving, forwarding or guiding of material by blowing air towards handled material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2406/00—Means using fluid
  • B65H2406/10—Means using fluid made only for exhausting gaseous medium
  • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2701/00—Handled material; Storage means
  • B65H2701/10—Handled articles or webs
  • B65H2701/17—Nature of material
  • B65H2701/176—Cardboard
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2801/00—Application field
  • B65H2801/03—Image reproduction devices
  • B65H2801/21—Industrial-size printers, e.g. rotary printing press

Definitions

• the invention relates to a boom of a sheet-processing machine, in particular a printing press, with rows of grippers, which pull the sheet operatively along a conveyor line, endless conveyor chains, which pass through the boom operatively in a circumferential direction and carry the gripper rows, a pair about a common axis of rotation rotatable sprockets which are in engagement with the conveyor chains and form a deflection region of the conveyor line and with a Blasluftquelle which ejects a Blasluftvorhang, by means of which the Bogenumlenk Scheme passing arc at its side facing the axis of rotation can be acted upon.
• Such a boom is known for example from the document US 5,456,178.
• This discloses an air curtain ejected from a blowpipe assembly that is aligned with an environment of a transfer region in which a respective one of the looper rows accepts a respective one of the sheets from a cylinder leading them. Leaves the trailing end of each sheet this transfer area, so the bow can from this end - d. H. in sheet travel direction - be under blown. However, this has a very unfavorable effect on a smooth course of the bow.
• a respective arc is continuously applied to a blown air curtain when passing through a deflection sprocket formed by a drive sprocket.
• Document US Pat. No. 5,626,075 discloses a fan arranged within a deflection region which ejects blowing air substantially radially over the entire circumference of an imaginary cylindrical envelope surface.
• the gripper row takes over a sheet of a printing cylinder of a printing unit and passes to a next printing unit of a rotary printing machine in a row construction.
• this drum has a jacket which supports the sheet only along a part of its extent in the circumferential direction of the drum.
• a bow supporting the sheet is provided pneumatically supporting.
• this support means comprises a blowing tube parallel to the drum axis, which is arranged close to an enveloping circle applied to the drum, with respect to the drum axis radially outwardly directed exhaust openings and rotates with the drum.
• the problem does not occur in connection with the avoidance of Passerdifferenzen. Instead, the general problem here is to transfer printed sheets to a sheet feeder without smearing and to combine them into a stack.
• One of the operations to be performed in this context is a smooth running of the bows.
• the invention has the object of providing a boom of the type mentioned in such a way that unfavorable influences on the part of the Blas Kunststoffvorhanges is counteracted to a smooth running of the Bogenumlenk Scheme passing arc.
• An advantageous embodiment provides that the blowing direction of the Blas Kunststoffvorhanges the direction of the Bogenumlenk Scheme passing arc tends to be opposite, so that the blowing direction has one of the direction of the deflection region passing conveyor chains opposing component.
• the blowing direction of the Blas Kunststoffvorhanges is adjustable, that the Blasluftvorhang the Bogenumlenk Scheme happens at an adjustable distance to the conveyor line, and that the Blas Kunststoffvorhang the Bogenumlenk Scheme happens in an adjustable phase angle to the grippers.
• the Blas Kunststoffán ejects the Blas Kunststoffvorhang clocked.
• the output of the Blas Kunststoffvorhanges be limited to a period in which the Blas Kunststoffvorhang the Bogenumlenk Scheme happens in the same sense as the gripper, so that possibly undesirable occurring outside the Bogenumlenk Schemees flow conditions in the vicinity of the conveyed sheet can be avoided.
• a boom 1 connects in the processing direction to a last processing station of the printing press.
• a processing station may be a printing unit or a post-treatment plant, such as a coating unit.
• the last processing station is an offset printing unit 2 with a printing cylinder 2.1. This leads a respective sheet 3 in a direction indicated by the direction of rotation arrow 5 processing direction through a pressure gap between the impression cylinder 2.1 and a cooperating blanket cylinder 2.2 and transfers it in the present example, following a gripper row of a single-speed transfer drum 2.3 under opening a arranged on the printing cylinder 2.1, for detecting the sheet 3 to a gripper edge provided at the leading end of the sheet 3 gripper row.
• a corresponding transfer of the sheet 3 is then carried out by the single-speed transfer drum 2.3 to another in the present example half-round transfer drum 2.4, which finally passes the sheet 3 to the boom 1.
• This comprises two endless conveyor chains, of which a respective one in the vicinity of a respective side wall of the boom 1 operatively revolves along a closed chain path.
• a respective conveyor chain wraps around each one of two synchronously driven drive sprockets 7, whose axes of rotation are aligned, and is guided in the present example via one opposite the drive sprockets 7 downstream with respect to the processing direction Umlenkkettenrad 8, so that a respective one of the conveyor chains 6 passes through a closed chain path ,
• gripper bars 9 Between the two conveyor chains 6 are supported by these gripper bars 9 with grippers 9.1, which pass through gaps between the arranged on the transfer drum grippers 2.4 and a respective sheet 3 while detecting said gripper edge at the leading end of the sheet 3 immediately before opening at the transfer drum 2.4 arranged gripper take him across a sheet guiding device 10 away to a braking station 11 and open after the transfer of the sheet 3 to the brake station 11.
• the sheets 3 are decelerated to a speed reduced compared to the processing speed and finally released, so that a respective now slowed sheet 3 finally impinges on leading edge stops 12 and aligned with these and these opposite trailing edge stops 13 together with Previous and / or subsequent sheet 3 forms a stack 14 which can be lowered by means of a hoist to the extent that the stack 14 increases. From the hoist in Fig. 1, only a stack 14 supporting platform 15 and this supporting, dash-dotted lines indicated lifting chains 16 are shown.
• the conveyor chains 6 are guided along their paths between the drive sprockets 7 on the one hand and the Umlenkkettenganizan 8 on the other hand by means not shown chain guide rails which determine the chain tracks of the chain.
• the sheets 3 are transported from the in Fig. 1 mainly lying below the chain center along a conveying path extending from the point of transfer of the sheet 3 from the printing cylinder 2.4 to the boom 1 to a point at the one in the region of one of the Umlenkkettencken 8 arranged cam 4 a not shown in operative connection with the grippers 9.1 roller lever operated and thus the closed under spring tension gripper opens 9.1 releasing the sheet 3.
• the section of the chain track which passes through the section of chain lying mainly at the bottom, is followed by a sheet guiding surface 17 facing the sheet guiding device. Between the latter and the respective sheet 3 passed over, a carrying air cushion is preferably formed.
• the sheet guiding device 10 is equipped with opening into the sheet guide 17 Blas Kunststoffdüsen, of which in Fig. 1, only a representative of their entirety, and in symbolic representation in the form of the neck 18 is reproduced.
• the sheet 3 of the drive sprockets 7 are on the way to Brake 11, a dryer 19 and a dusting device 20 is provided.
• a coolant circuit is integrated into the sheet guiding device 10, which is symbolically indicated in Fig. 1 by an inlet port 21 and an outlet 22 on one of the sheet guide 17 arranged coolant trough 23.
• said conveying path has a horizontal section, a branch ascending towards the horizontal section upstream of the latter and a sheet deflection zone 24 upstream of the latter, which presents a problematic area even if the sheets are only printed on one side, as they can perform uncontrolled movements without further action, which can cause a greasing of still fresh paint color.
• the blown air source 26 is preferably formed using a pipe 26.1 arranged parallel to the axis of rotation of the drive chain wheels 7, which has in its longitudinal direction a series of blown air openings 26.2, one of which can be seen in FIG. 2a.
• a blast air source 26 configured in this way does not preclude ejecting the bend deflecting region 24 in the abovementioned blown air curtain 25 from blast air sources configured in a different way.
• said assembly is formed in the present embodiment as follows.
• the two drive sprockets 7 are rotatably connected to a journal 27.1 and 27.2 having sprocket axis 27.
• the sprocket axle 27 carries one each connected in its circumferential direction frictionally connected thereto Hub 28.
• spokes 29 are adjustably mounted in the longitudinal direction, in the present example half-cycle drive sprockets 7 per hub 28 two spokes 29. Due to the half-speed design of the drive sprockets 7 are - as can be seen in particular in Fig. 3 - two blast air sources 26 is provided, of which a respective is formed in the manner already explained by means of a tube 26.1.
• the respective tube 26.1 is closed at its ends with a pin 30 projecting beyond the tube 26.1.
• a respective bore parallel to the axis of rotation of the drive sprockets 7 in the respective radially outer end of the spokes 29 slidably receives one of these spigots 30 in the bore.
• a respective thus mounted, used to form a Blas Kunststoffario pipe 26.1 is thus rotatable with respect to its longitudinal axis, and a certain rotational position of the same by means of at least one of the pipe 26.1 bearing spokes used and acting on one of the pins 30 clamping screw 31 can be fixed.
• the blowing direction of the blower air source 26 - here the said Blasdüsengol having tube 26.1 - operatively ejected Blas Kunststoffvorhanges is adjustable and is preferably adjusted so that it tends to counter the direction of the Bogenumlenk Scheme 24 passing arc.
• the blower air source 26 and the drive sprockets 7 comprehensive unit forms a drum body 32 which is received by means of the axle journals 27.1 and 27.2 rotatably provided in side walls 33 and 34 of the sheet conveyor 1 bearing bores 33.1 and 34.1.
• the sprocket axis 27 is formed so hollow that results in the axle journal 27.1 communicating with the bearing bore 33.1 cavity 35.
• This is in the present example, as shown in FIG. 3, realized in that the sprocket axis 27 of a tube 27 'and welded at its ends axle sections 27' and 27 ''' is composed, of which the axle portion 27 "is provided with an opening into the tube 27 'forming the cavity 35 through hole.
• axle journal 27.1 projects into only part of the depth of the bearing bore 33.1 and the end of the bearing bore 33.1 facing away from the sprocket axle 27 is closed by means of a cover 36 which has a connection nipple 37, via which the bearing bore 33.1 can be connected to a compressed air generator 38 ,
• the blast air curtain 25 can pass the sheet deflecting region 24 to the conveying path in a distance A within an adjustment range.
• the blast air curtain 25 can pass the sheet deflecting area 24 at an adjustable phase angle ⁇ to the grippers 9.1.
• the grippers 9.1 in turn pass through the Bogenumlenk Scheme 24 during normal rotation of the drum body 32, which in particular includes the drive sprockets 37, which are looped by the gripper bars 9 supporting conveyor chains 6.
• the sprocket axis 27 is rotatably connected in the present embodiment with a drive gear 40, which is a part of a connected to drive means gear train.
• the sheet guiding device 10 is preceded by a sheet troller 41, which is usually used in the case of single-sided sheet - here on the side facing away from the sheet guiding device 10 side of the sheet - while the sheet by means of a negative pressure in one to both side edges the bow draws vertical unrolling nip into it.
• said negative pressure only becomes fully effective in this sense when the respective sheet has been applied to the sheet troller 41. Since the latter is usually arranged in close proximity to the outlet region of the Bogenumlenk Schemees, the application of the sheet 3 is promoted to the Bogenentroller 41 by the Bogenumlenk Scheme 24 passing Blas Kunststoffvorhang 25.
• blower air source 26 in the form of the pipe 26.1 carried by the spokes 29, provides the advantages of good accessibility of the sheet deflection area 24 for cleaning purposes and good visibility of the pipe Bogenumlenk Schemees 24, which is particularly helpful in the case of both sides printed sheet in the adjustment of the pneumatically actuated sheet guiding device 10 '.
• FIG. 4 an embodiment of a clocked ejection of the Blas Kunststoffvorhanges 25 from the Blas Kunststoffmaschine 26 is indicated, namely the example of a Blas Kunststoffsammlung 26 and the two drive sprockets 7 comprehensive assembly in the form of a drum body 32 ', although the drum body 32 shown in FIG. 3 in principle equals, but deviates from this insofar as this half-speed and that of FIG. 4 is formed a single-turn and thus only one the blown air source 26 performing pipe 26.1.
• the bearing bore 33.1 corresponding to the exemplary embodiment according to FIG.
• a switching valve 43 which is mechanically exemplary here is alternately opened and closed by means of a synchronously with the drum body 32 'rotating cam 44 in operation.
• the phase position of the cam 44 relative to the drum body 32 ' is set so that the switching valve 43 is opened when the Blasluftario 26 passes the Bogenumlenk Scheme 24.
• a corresponding but alternating clocked admission of the formation of the half-turn drum body 32 shown in FIG. 3 provided pipes 26.1 with compressed air is realized in an analogous manner and with a pertinent modification of the drum body 32 and its connection to the compressed air generator 38 that the two operationally a blown air curtain 25th ejecting tubes 26.1 are independently connected to the compressed air generator 38.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Discharge By Other Means (AREA)
• Delivering By Means Of Belts And Rollers (AREA)
• Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
• Manipulator (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)

Applications Claiming Priority (2)

Publications (3)

Family

ID=7889794

Family Applications (1)

Country Status (5)

Families Citing this family (7)

Family Cites Families (13)

• 1999
  • 1999-11-11 EP EP99122013A patent/EP1006068B1/de not_active Expired - Lifetime
  • 1999-11-11 DE DE59906937T patent/DE59906937D1/de not_active Expired - Lifetime
  • 1999-11-11 AT AT99122013T patent/ATE249384T1/de not_active IP Right Cessation
  • 1999-11-12 DE DE19954554A patent/DE19954554A1/de not_active Withdrawn
  • 1999-12-03 US US09/454,199 patent/US6401611B1/en not_active Expired - Fee Related
  • 1999-12-03 JP JP34434999A patent/JP4633877B2/ja not_active Expired - Fee Related

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